Uni-Ball Signo UM-153 Gel Ink Rollerball Pen, 1.0mm, Broad Point, Black Ink, Pack of 6

Great pen for rock painting. Fine lines for written messages.

These are great pens. I use them for ink tracing. Thick bold line and flows well. Have made several purchases.

Absolutely in love with these pens! I usually use these for artwork and occasional notes. I got one for a gift last year and loved it so much I had to buy more. I love how dark the ink is and how smoothly they write. It does have a little bit of dry time (like most gel pens) so be aware of that. Definitely worth the money. Decent grip and size, great performance. 10/10 recommend

I have bought many of these pens over the counter in Japan (Loft), and they have been great and lasted well. These online purchases are very disappointing. I've used 2 of the 6 and they have both performed badly. As soon as the pen hits the paper I end up with a great splotch of ink. They also ran out very quickly but I guess that's because the ink just seems to fall out of them as they touch the paper.

My manager had one of these pens and I took a pic of it so I could find it myself. It’s one of the best pens I’ve ever used!